Examinando por Autor "Turín Canchaya, Cecilia Claudia"

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Assessing soil and native high Andean grassland quality under grazing: A case study from the wet Puna of Peru
(John Wiley & Sons Australia, 2026-02-13) Arias Arredondo, Alberto Gilmer; Pérez Porras, Wendy Elizabeth; Lastra Paucar, Sphyros Roomel; Cruz Luis, Juancarlos Alejandro; Solórzano Acosta, Richard Andi; Turín Canchaya, Cecilia Claudia
High Andean grasslands are vulnerable to changes in their nutritional quality and carbon sequestration capacity, especially in grazing systems. This study evaluated soil quality and native grasses by measuring carbon, physicochemical parameters, and the nutritional quality of predominant species in the wet Puna of Junín, Peru. Significant differences were found in carbon storage and nutritional quality across different grazing grassland sites. Soil carbon levels were consistently high across all sites, with significant concentrations at San Pedro de Cajas (14.26% ± 11.7%; p < 0.05), and its carbon stock (210.7 ± 111.3 Mg/ha) exceeded that of Junín (+68%) and Ulcumayo (+107%). Also, the flat topography at this site is presumed to have influenced its soil fertility. No adverse relationship was observed between carbon content and animal units, regardless of continuous or rotational grazing system, and a strong negative Pearson correlation (r = 0.84) between total carbon and bulk density indicated the prevalence of organic materials and no soil compaction. It emphasizes how landscape features affect soil quality and ecosystem processes. The protein content of key species exhibited a strong Pearson correlation with plant phosphorus (r = 0.93), digestible organic matter (DOM), and metabolizable energy (ME; r = 0.75). The Redundancy Analysis (RDA) showed that plant functional traits are driven by chemical and physical gradients, underscoring the combined effects of nutrient availability and site constraints on pasture productivity and forage quality. Among native grasses, Cebadilla (Calamagrostis vicunarum [Wedd.] Pilg.) emerged as the most favorable option for animal nutrition and exhibited a significantly higher crude protein content (8.23% ± 0.89%), Metabolizable energy value (8.16 MJ/kg), and C/N ratio (~40). Future research should focus on linking soil and forage quality with animal physiological responses to improve understanding of grazing impacts and guide sustainable management in high-altitude grasslands.
Soil management in Lepidium meyenii (maca) monoculture: trends and challenges for small farmers around Lake Chinchaycocha in the Andean highlands of Junin (Peru)
(Frontiers Media S.A., 2025-01-17) Solórzano Acosta, Richard Andi; Chanco, Mirella; Seminario, Martín; Camel Paucar, Vladimir Fernando; Cabello Torres, Rita; Lastra Paucar, Sphyros Roomel Luciano; Arias Arredondo, Alberto Gilmer; Verástegui Martínez, Patricia; Quispe Matos, Kenyi Rolando; Carbajal Llosa, Carlos Miguel; Cuevas Gimenez, Juan Pablo; Cruz Luis, Juancarlos Alejandro; Turín Canchaya, Cecilia Claudia
Introduction: Monoculture is a significant concern due to its negative impact on soil quality, resource productivity, and agricultural sustainability, particularly in vulnerable communities. This research aims to evaluate high Andean soil management for maca monoculture. Materials and methods: To this end, interviews were conducted with maca farmers adjacent to Lake Chinchaycocha. The effect on soil quality was evaluated based on principal component analysis (PCA), weighted soil quality index (SQIw), and physico-chemical characteristics. Results: The results indicated differences between farmers in agronomic management, monoculture period (from 5 to 9 years), and fallow time (up to 10 years in the best cases). Regarding soil quality, the PCA highlighted boron andtotal nitrogen locations in the same quadrant, with the highest contribution to the analysis. Finally, the SQIw showed that soils without maca cultivation presented better quality. Conclusion: This research’s results indicate a need to optimize soil management practices, especially for small farmers, who are the most vulnerable group. In addition, further studies on boron and nitrogen availability in soils cultivated with maca are required, emphasizing areas that exceed 10 years of continuous use.